sample code about CryptoAPI

Discussion in 'Win32' started by 李一磊, Mar 20, 2008.

  1. 李一磊

    李一磊 New Member

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    Code:
    void DeriveKeyTest::Testkey(DWORD ulALG)
{
	HCRYPTPROV hCryptProv = NULL;
	HCRYPTKEY hKey = 0;
	HCRYPTHASH hHash = 0;
	char *szPassword = "UsbToken Derive key test!";
	DWORD dwLength = 0;

	cout << endl << "Test CSP: " << TEST_CSP_NAME << endl << endl;

	// Create a keyset(aka container), if the keyset already exists,
	// delete it and re-create it.

	BeginAction("CryptAcquireContext() CRYPT_NEWKEYSET");
	if(!CryptAcquireContext(&hCryptProv,
				CONTAINER,
				TEST_CSP_NAME,
				PROV_RSA_FULL,
				CRYPT_NEWKEYSET))
	{
		DWORD dwLastErr = GetLastError();
		ActionFailed(dwLastErr);

		if(0x8009000F == dwLastErr) //  Object already exists.
		{
			BeginAction("CryptAcquireContext() CRYPT_DELETEKEYSET");
			if(!CryptAcquireContext(&hCryptProv,
						CONTAINER,
						TEST_CSP_NAME,
						PROV_RSA_FULL,
						CRYPT_DELETEKEYSET))
			{
				ActionFailed(GetLastError());
				return;
			}
			else
			{
				ActionSuccess();
				BeginAction("CryptAcquireContext() CRYPT_NEWKEYSET");
				if(!CryptAcquireContext(&hCryptProv,
							CONTAINER,
							TEST_CSP_NAME,
							PROV_RSA_FULL,
							CRYPT_NEWKEYSET))
				{
					ActionFailed(dwLastErr);
					return;
				}
				else
				{
					ActionSuccess();
				}
			}
		}
		else
			return;
	}
	else
	{
		ActionSuccess();
	}

	// Hold the handle and release when this function return.
	HCRYPTPROV_Holder holder(hCryptProv);

	// Create a hash object.
	BeginAction("CryptCreateHash()");
	if(!CryptCreateHash(hCryptProv, CALG_MD5, 0, 0, &hHash))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	// Hash the password string.
	dwLength = lstrlen(szPassword);

	BeginAction("CryptHashData()");
	if(!CryptHashData(hHash, (BYTE *) szPassword, dwLength, 0))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	// Create a block cipher session key based on the hash of the password.
	BeginAction("CryptDeriveKey()");
	if(!CryptDeriveKey(hCryptProv, ulALG, hHash, CRYPT_EXPORTABLE, &hKey))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	//Encrypt Data with RC2 key:
	BYTE pData[1024] = "UsbToken: Encrypt Data with the derive key (des or rc4) /!\0";
	DWORD dwLen = lstrlen((LPCTSTR) pData);//60;
	cout << "Data to be encrypted:" << endl; 
	ShowData(pData, dwLen);

	//encrypt:
	BeginAction("CryptEncrypt()");
	if(!CryptEncrypt(hKey, NO_HASH, LAST_DATA, 0, pData, &dwLen, 1024))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after encrypted:" << endl;
		ShowData(pData, dwLen);
	}

	//Decrypt Data with RC2 key:
	BeginAction("CryptDecrypt()");
	if(!CryptDecrypt(hKey, NO_HASH, LAST_DATA, 0, pData, &dwLen))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after decrypted:" << endl;
		ShowData(pData, dwLen);
	}
}
     
    李一磊, Mar 20, 2008
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  2. 李一磊

    李一磊 New Member

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    Code:
    void GetProvParam(void)
{
	HCRYPTPROV hCryptProv = NULL;
	cout << endl << "Test CSP: " << TEST_CSP_NAME << endl << endl;

	BeginAction("CryptAcquireContext()");
	if(!CryptAcquireContext(&hCryptProv,
				NULL,
				TEST_CSP_NAME,
				PROV_RSA_FULL,
				CRYPT_VERIFYCONTEXT))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	// Hold the handle and release when this function return.
	HCRYPTPROV_Holder holder(hCryptProv);

	//Enum algs those CSP support:
	DWORD i = 0;
	CHAR szName[100] = {0}; // Often allocated dynamically
	BYTE pbData[1000] = {0}; // Often allocated dynamically
	DWORD cbData = 0;
	DWORD dwFlags = 0;
	CHAR *pszAlgType = NULL;
	
	// Enumerate the supported algorithms.
	cout<< "  ALG_ID     KeyLen   Type            Name" << endl
		<< "----------------------------------------------------------------" << endl;

	for(i=0 ; ; ++i) 
	{
		// Set the CRYPT_FIRST flag the first time through the loop.
		if(i == 0) 
		{
			dwFlags = CRYPT_FIRST;
		} 
		else 
		{
			dwFlags = 0;
		}
		
		// Retrieve information about an algorithm.
		cbData = 1000;
		if(!CryptGetProvParam(hCryptProv, PP_ENUMALGS, pbData, &cbData, dwFlags)) 
		{
			DWORD dwLastErr = GetLastError();
			if(ERROR_NO_MORE_ITEMS == dwLastErr)
			{
				// Exit the loop.
				break;
			}
			else 
			{
				;
				return;
			}
		}
		// Extract algorithm information from the 'pbData' buffer.
		PROV_ENUMALGS* pEnum = (PROV_ENUMALGS*)pbData;
		
		// Determine the algorithm type.
		switch(GET_ALG_CLASS(pEnum->aiAlgid)) 
		{
		case ALG_CLASS_DATA_ENCRYPT: pszAlgType = "Encrypt     ";
			break;
		case ALG_CLASS_HASH: pszAlgType = "Hash        ";
			break;
		case ALG_CLASS_KEY_EXCHANGE: pszAlgType = "Exchange    ";
			break;
		case ALG_CLASS_SIGNATURE: pszAlgType = "Signature   ";
			break;
		default: pszAlgType = "Unknown     ";
		}
		
		// Print information about the algorithm.  
//		printf("Algid:%8.8xh, Bits:%-4d, Type:%s, NameLen:%-2d, Name:%s\n",
//			aiAlgid, dwBits, pszAlgType, dwNameLen, szName
//			);

//		cout<< "ALG_ID: " << std::setfill('0') << std::setw(8) << hex << pEnum->aiAlgid
//			<< "KeyLen: " << std::setfill(' ') << std::setw(4) << dec << pEnum->dwBitLen
//			<< "Type  : " << pszAlgType
//			<< "Name  : " << pEnum->szName
//			<< endl;
		cout<< "  "
			<< std::setfill('0') << std::setw(8) << hex << pEnum->aiAlgid
			<< "    "
			<< std::setfill(' ') << std::setw(4) << dec << pEnum->dwBitLen
			<< "    "
			<< pszAlgType
			<< "    "
			<< pEnum->szName
			<< endl;
	}

	//ActionSuccess();

}
     
    李一磊, Mar 20, 2008
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  3. 李一磊

    李一磊 New Member

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    Code:
    void CRSA::TestRSA(void)
{
	HCRYPTPROV hCryptProv = NULL;

	cout << endl << "Test CSP: " << TEST_CSP_NAME << endl << endl;

	// Create a keyset(aka container), if the keyset already exists,
	// delete it and re-create it.

	BeginAction("CryptAcquireContext() CRYPT_NEWKEYSET");
	if(!CryptAcquireContext(&hCryptProv,
				CONTAINER,
				TEST_CSP_NAME,
				PROV_RSA_FULL,
				CRYPT_NEWKEYSET))
	{
		DWORD dwLastErr = GetLastError();
		ActionFailed(dwLastErr);

		if(0x8009000F == dwLastErr) //  Object already exists.
		{
			BeginAction("CryptAcquireContext() CRYPT_DELETEKEYSET");
			if(!CryptAcquireContext(&hCryptProv,
						CONTAINER,
						TEST_CSP_NAME,
						PROV_RSA_FULL,
						CRYPT_DELETEKEYSET))
			{
				ActionFailed(GetLastError());
				return;
			}
			else
			{
				ActionSuccess();
				BeginAction("CryptAcquireContext() CRYPT_NEWKEYSET");
				if(!CryptAcquireContext(&hCryptProv,
							CONTAINER,
							TEST_CSP_NAME,
							PROV_RSA_FULL,
							CRYPT_NEWKEYSET))
				{
					ActionFailed(dwLastErr);
					return;
				}
				else
				{
					ActionSuccess();
				}
			}
		}
		else
			return;
	}
	else
	{
		ActionSuccess();
	}

	// Hold the handle and release when this function return.
	HCRYPTPROV_Holder holder(hCryptProv);

	HCRYPTKEY hKey;
	BeginAction("CryptGenKey()");
	if(!CryptGenKey(hCryptProv, AT_KEYEXCHANGE, 0, &hKey))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	BYTE pData[DATALEN] = {0};
	unsigned long ulDataLen = DATALEN;
	DWORD ulEncryptedLen = ulDataLen;
	BYTE *pOut = NULL;
	for(int i = 0; i < DATALEN; i++)
	{
		pData[i] = i % 255;
	}

	cout << "Data to be encrypt:" << endl;
	ShowData(pData, ulDataLen);

	BeginAction("CryptEncrypt()");
	if(!CryptEncrypt(hKey, 0, TRUE, 0, NULL, &ulEncryptedLen, ulDataLen))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	pOut = new BYTE[ulEncryptedLen];

	memset(pOut, 0, ulEncryptedLen);
	memcpy(pOut, pData, ulDataLen);
	DWORD ulTemp = ulDataLen;
	ulDataLen = ulEncryptedLen;
	ulEncryptedLen = ulTemp;

	BeginAction("CryptEncrypt()");
	if(!CryptEncrypt(hKey, 0, TRUE, 0, pOut, &ulEncryptedLen, ulDataLen))
	{
		delete[] pOut;
		pOut = NULL;
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
//		for(DWORD i = 0; i < ulEncryptedLen; i++)
//		{
//			printf("%d=%d, ", i, pOut[i]);
//		}
		cout << "Data encrypted:" << endl;
		ShowData(pOut, ulEncryptedLen);
	}

	BeginAction("CryptDecrypt()");
	if(!CryptDecrypt(hKey, 0, TRUE, 0, pOut, &ulEncryptedLen))
	{
		delete[] pOut;
		pOut = 0;
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
//		for(DWORD i = 0; i < ulEncryptedLen; i++)
//		{
//			if(pOut[i] != i % 255)
//			{
//				printf("\n%d=error!", i);
//			}
//			else
//			{
//				printf("%d=%d, ", i, pOut[i]);
//			}
//		}
		cout << "Data to decrypted:" << endl;
		ShowData(pOut, ulEncryptedLen);
	}

	if(0 != memcmp(pData, pOut, ulEncryptedLen))
	{
		delete[] pOut;
		pOut = NULL;
		//printf("\n....RSA key Encryption and Decryption Failed!....\n");
		cout << "Data not equal, encrypt/decrypt failed." << endl;
	}
}
     
    李一磊, Mar 20, 2008
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  4. 李一磊

    李一磊 New Member

    Joined:
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    more...

    Code:
    void SysKeyTest::TestKey(DWORD ulALG)
{
	HCRYPTPROV hCryptProv = NULL;
	cout << endl << "Test CSP: " << TEST_CSP_NAME << endl << endl;

	// Create a keyset(aka container), if the keyset already exists,
	// delete it and re-create it.

	BeginAction("CryptAcquireContext() CRYPT_NEWKEYSET");
	if(!CryptAcquireContext(&hCryptProv,
				CONTAINER,
				TEST_CSP_NAME,
				PROV_RSA_FULL,
				CRYPT_NEWKEYSET))
	{
		DWORD dwLastErr = GetLastError();
		ActionFailed(dwLastErr);

		if(0x8009000F == dwLastErr) //  Object already exists.
		{
			BeginAction("CryptAcquireContext() CRYPT_DELETEKEYSET");
			if(!CryptAcquireContext(&hCryptProv,
						CONTAINER,
						TEST_CSP_NAME,
						PROV_RSA_FULL,
						CRYPT_DELETEKEYSET))
			{
				ActionFailed(GetLastError());
				return;
			}
			else
			{
				ActionSuccess();
				BeginAction("CryptAcquireContext() CRYPT_NEWKEYSET");
				if(!CryptAcquireContext(&hCryptProv,
							CONTAINER,
							TEST_CSP_NAME,
							PROV_RSA_FULL,
							CRYPT_NEWKEYSET))
				{
					ActionFailed(dwLastErr);
					return;
				}
				else
				{
					ActionSuccess();
				}
			}
		}
		else
			return;
	}
	else
	{
		ActionSuccess();
	}

	// Hold the handle and release when this function return.
	HCRYPTPROV_Holder holder(hCryptProv);

	HCRYPTKEY hKey = NULL;
	BeginAction("CryptGenKey()"); 
	if (!CryptGenKey(hCryptProv, ulALG, /*CRYPT_EXPORTABLE*/0,  &hKey))//RC4/DES are similar!!!!!!!!!!!!!!!!!!!
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	//Encrypt Data with a key:
	#define BUF_SIZE  1024

	BYTE pData[BUF_SIZE] = "UsbToken: Encrypt Data with the derive key (des or rc4) /!\0";
	BYTE pOrinData[BUF_SIZE] = {0};
	DWORD dwLen = 60;
	DWORD dwRetLen = dwLen;
	memcpy(pOrinData, pData, dwLen);

	cout << "Data to be encrypted:" << endl; 
	ShowData(pData, dwLen);

	//encrypt, first get size.
	BeginAction("CryptEncrypt()"); 
	if(!CryptEncrypt(hKey, NO_HASH, LAST_DATA, 0, NULL, &dwRetLen, BUF_SIZE))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	//Get encrypted value:
	BeginAction("CryptEncrypt()"); 
	if(!CryptEncrypt(hKey, NO_HASH, LAST_DATA, 0, pData, &dwLen, BUF_SIZE))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after encrypted:" << endl;
		ShowData(pData, dwLen);
	}

	//Decrypt Data with a key:
	BeginAction("CryptDecrypt()"); 
	if(!CryptDecrypt(hKey, NO_HASH, LAST_DATA, 0, pData, &dwLen))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after decrypted:" << endl;
		ShowData(pData, dwLen);
	}

	if(0 != memcmp(pData, pOrinData, dwLen))
	{
		cout << "Data not equal, encrypt/decrypt failed." << endl;
	}

	//////////////////////////////////////////////////////////////////////////
	// encrypt dulplicate
	dwLen = 60;
	memcpy(pData, pOrinData, dwLen);
	BYTE buf[1024] = {0};
	memcpy(buf, pOrinData, dwLen);
	dwRetLen = dwLen/2;

	BeginAction("CryptEncrypt() first block"); 
	DWORD enclen = dwLen/2;
	if(!CryptEncrypt(hKey, NO_HASH, FALSE, 0, NULL, &enclen, BUF_SIZE))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	//Get encrypted value:
	BeginAction("Get the first block result"); 
	enclen = dwLen/2;
	if(!CryptEncrypt(hKey, NO_HASH, FALSE, 0, buf, &enclen, BUF_SIZE))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after encrypted:" << endl;
		ShowData(buf, enclen);
	}

	BeginAction("CryptEncrypt() second block"); 
	if(!CryptEncrypt(hKey, NO_HASH, TRUE, 0, NULL, &dwRetLen, BUF_SIZE))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
	}

	//Get encrypted value:
	BeginAction("Get the second block result"); 
	dwRetLen = dwLen/2;
	memcpy(buf + enclen, pData + dwLen/2, dwRetLen);
	if(!CryptEncrypt(hKey, NO_HASH, TRUE, 0, buf + enclen, &dwRetLen, BUF_SIZE))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after encrypted:" << endl;
		ShowData(buf + enclen, dwRetLen);
	}

	//Decrypt Data with a key:

	// the first block
	BeginAction("CryptDecrypt() the first block"); 
	dwLen = enclen + dwRetLen;
	enclen = 16;
	if(!CryptDecrypt(hKey, NO_HASH, FALSE, 0, buf, &enclen))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after decrypted:" << endl;
		ShowData(buf, enclen);
	}

	BeginAction("CryptDecrypt() the second block"); 
	dwRetLen = dwLen - 16;
	if(!CryptDecrypt(hKey, NO_HASH, TRUE, 0, buf + 16, &dwRetLen))
	{
		ActionFailed(GetLastError());
		return;
	}
	else
	{
		ActionSuccess();
		cout << "Data after decrypted:" << endl;
		ShowData(buf + 16, dwRetLen);
	}
	memcpy(buf + enclen, buf + 16, dwRetLen);
	
	if (dwRetLen + enclen != 60)
	{
		cout << "Data not equal, encrypt/decrypt failed." << endl;
	}
	cout << "the whole decrypt data is" << endl;
	ShowData(buf, dwRetLen + enclen);

	if(0 != memcmp(buf, pOrinData, dwRetLen + enclen))
	{
		cout << "Data not equal, encrypt/decrypt failed." << endl;
	}
	
}
     
    李一磊, Mar 20, 2008
    SHARE #4

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